2-6-6. HAZARDOUS INFLIGHT WEATHER ADVISORY
Controllers must advise pilots of hazardous weather that may impact operations within 150 NM of their sector or area
of jurisdiction. Hazardous weather information contained in the advisories includes Airmen's Meteorological
Information (AIRMET), Significant Meteorological Information (SIGMET), Convective SIGMET (WST), Urgent Pilot Weather
Reports (UUA), and Center Weather Advisories (CWA). Facilities must review alert messages to determine the
geographical area and operational impact of hazardous weather information. Advisories are not required if aircraft
on your frequency(s) will not be affected.
Controllers must broadcast a hazardous inflight weather advisory on all frequencies, except emergency frequency,
upon receipt of hazardous weather information. Controllers are required to disseminate data based on the
operational impact on the sector or area of control jurisdiction. Pilots requesting additional information must be
directed to contact the nearest Flight Service.
ATTENTION ALL AIRCRAFT. HAZARDOUS WEATHER INFORMATION (SIGMET, Convective SIGMET, AIRMET, Urgent Pilot Weather
Report (UUA), or Center Weather Advisory (CWA), Number or Numbers) FOR (specific weather phenomenon) WITHIN
(geographical area) AVAILABLE ON FLIGHT SERVICE FREQUENCIES.
Terminal facilities have the option to limit hazardous weather information broadcasts as follows: Tower cab and
approach control facilities may opt to broadcast hazardous weather information alerts only when any part of the
area described is within 50 NM of the airspace under their jurisdiction.
. ERAM. Controllers must electronically acknowledge hazardous weather
information messages after appropriate action has been taken.
EN ROUTE. While hazardous weather information is commonly distributed via the SIGMET View, it is possible to
receive the information via the GI View.